GE 869 Instruction Manual page 480

CONTROL
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Figure 4-151: Navigation and SLD component selection
PB "Block" (Hardcoded SLD Pushbutton)
Blocking of a breaker (contactor) or switch can be used for simply inhibiting the close or
open operation while in Local Mode. The selected breaker (contactor) or disconnect switch
can be blocked. If block was not applied to the selected component, pressing "Block" PB
will block either the Open or Close command depending on the existing state (see
152:SLD Pushbutton "Block" logic
opened state, pressing the PB "Block" will block the closing command, and vice versa (see
figures: Local Control for breakers/Local Control for switches). When the block is active, the
letter "B" appears in the SLD next to the controlled component
Figure 4-152: SLD Pushbutton "Block" logic diagram
diagram). For example, if the selected component is in
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Figure 4-